Connection for tubes



' 1 630492 May 31, 1927. F KUSTERLE CONNECTION FOR TUBES Filed June 9. 1924 Patented May 31, 1 927.

UNITED STATES PATENT OFFICE.

FRANK KUSIERLE, OI KENOSHA, WISCONSIN, ASSIGNOR T0 SIMMONS COMPANY, OF

KENOSHA, WISCONSIN, A CORPORATION OF DELAWARE.

CONNECTION FOR TUBES.

Application filed June 9, 1924. Serial No. 718,716.

This invention relates to the joining bf light-weight metal tubes andmore particularly the types used in the construction of metal furnituresuch as chairs, bedsteads, etc, and has for its primary object toprovide a simple/strong and economical oint which is attractive inappearance.

Further objects are to facilitate the welding, brazing or solderingoperation, to conceal the joint, to strengthen the tubing at the joint,to insure the proper positioning of the tube sections, and to join tubesections of difi'erent sizes and shapes as, for example, a square tubewith a round tube.

The many other objects and advantages will be better understood byreference to the following specification when considered in connectionwith the accompanying drawing illustrating certain selected embodimentsthereof, in which ll ig. 1 is a top plan View of a portion of a chairframe embodying certain principles of my invention.

Fig. 2 is a perspective view of the leg construction illustrated in Fig.1.

Fig. 3 is a partial section on the line 3-3 of Fig. 1, and

Fig. 4 is an elevation of a portion of a bedstead frame in which myimproved jolnt is incorporated.

Referring to the drawing and particularly Figs. 1 to 3, the joint isused to-connect a round tube section as 5 to a length or section ofsquare tube as 6. The section 5 is one of the ornamental legs of a chairand the section 6 is a portion of the frame which is to be connected tothe upper end of said leg and in alignment therewith. The section 5 ispreferably provided with a parallel extension 7 of proper diameter tofit snugly within thesection 6 when the sections are assembled. 7

A stamped mount 8 of proper size and she. e to fit snugly over the lowerend of section 6 is slid overthe upper end of the section 5 and forms asubstantially cupshaped socket to receive and fit about the lower end ofthe section 6. The bottom wall of this mount forms an abutment on whichthe end of the section 6 rests and is apertured to fit snugly around theextension 7. The tube section 5 is preferably provided with anenlazlgement forming a shoulder 10 to support e downward thrust imposedupon the mount.

end of the section 5 in axial alignment until this end of the section 6is seated in the socket formed by the mount 8. Thus the sections areaccurately positioned relative to each other. The sections may bepermanently connected together in various ways, but I prefer to weld theupper end of the extension 7 to the opposing wall of the section 6 as at12. l have used the term Weld to include braze. solder or otherwisefasten. The mount 8 while concealing the joint, also forms an ornamentaltrim around the lower end of the tube 6. A joint of this character isparticularly advantageous with light weight tubing such as is generallyused in metal furniture.

In the present embodiment, the section 6 is cut away as at 13 and 14 toadmit the frame members 15 and 16 respectively of the chair frame. Thesemembers are preferably welded to the leg and to each other as at 17.

In Fig. 4 is illustrated the application of my invention to bedsteadconstruction. The leg section 18 of round tubing is connected to thesquare post section 19 in the same manner as with the sections 5 and 6of the previous embodiment.

While the principles of my invention arc applicable to joints forvarious tube sections, they are particularly aduantageous where thesections are of diife-rent shape. It will be readily evident from theforegoing description that my improved joint is simple, strong andeconomical as well as attractive in appearance.

The described details of construction bein merely illustrative of myinvention, it will be understood that the scope of the invention shouldbe determined by reference to the appended claims, said claims beingconstructed as broadly as possible consistent with the state of the art.

I claim as my invention:

1. In a structure of the class described, the combination of a tube, amount secured on said tube at an interval from its end, a secondtube ofa larger size and different shape telescoping the end of the firstmentioned Inc of sai larger tube and a welded connection between thetelescoping ends of the tubes.

2. In a structureof the class described, the combination of a tube, amount fittin said tube and welded thereon at an interva from the end, asecond tube telescoping the end of the first mentioned tube and havingits end abutting said mount, and a welde connection between thetelescoping ends of the tubes, said mount being provided with an ed Iends of said tubes.

4.-In a structure of the class described, the combination of a tubehaving, an annular shoulder formed thereon adjacent one end, a mountfitting around the outside of said tube and abutting said shoulder, awelded connection between said tube and said mount, a second tube havingits end fitting in said mount, said first mentioned tube having anextension rojecting into the second tube, and a wel ed connectionbetween said extension and said second tube.

5. In a structure of the class described, the combination of an innertube having an annular shoulder portion intermediate its ends andprojecting outwardly beyond an adjacent portion of said tube, a mount artured to fit said portion and supporte by said shoulder, and an outertube of different shape telescoping over said portion of the firstmentioned tube, and having its end seated against said mount,,said mounthaving'an outer portion shaped to conform with the shape of the secondtube.

6. In a structure of the class described, the combination of an innertube having an annular shoulder portion intermediate its ends andprojecting outwardly beyond an adjacent portion of said tube, a mountapertured to fit said ortion and supported by said shoulder, an an outertube of different shape telescoping over said portion of the firstmentioned tube, and having its end seated against said mount, said mounthaving an outer portion shaped to conform with the shape of the secondtube, and having a flange for enclosing the seated end of the lastmentioned tube.

FRANK KUSTERLE.

